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Old 12-30-2004, 11:33 AM   #1
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Default grinding gears

when i give my car throttle the gears seem to grind pretty bad. the 47t isnt moving but the others are. ive moved the motor around alot to move the gears and it still grinds. can anyone help me with this problem?
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Old 01-04-2005, 01:30 PM   #2
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what kind of car is it?
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Old 01-04-2005, 05:59 PM   #3
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could u give more description on your problem
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Old 02-03-2005, 08:12 AM   #4
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I had the same problem on my HPI RS4 3 EVo. When I hit the throttle, I hear the engine reving but the car was inching forward. I had to change the spur gear 47 because it was worn down. The screws came loose on the engine mount and moved the engine slightly and it was enough to change contact pattern causing premature wear on the teeth. Simply enough, just replaced a 3 dollar part and tightened the engine mount screws with some thread lock and never saw the problem again.
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